Improvement in electric indicators for elevators



A. HAHL.

Electric Indicators for'El'evatcrs.

Patented March 10. 1874.

No.l48,447.

d l WEIL U M M /A idw ,do L J .d W am www U NITED STATES PATENT QFFICE.

AUGUSTUS HAHL, OF WASHINGTON, DISTRICT OF COLUMBIA.

IMPROVEMENT IN ELECTRIC INDICATORS FOR ELEVATORS.

Speclication forming part of Letters Patent No. 148,447, dated March 10,1874; application Iiled February '7, 1872.

To all whom it may concern:

Beit known that I, AUGUSTUS HAHL, of the city and county of Washington,in the District of Columbia, have invented an Improved ElectricalIndicator for Elevators; and I do hereby declare the following to be afull, clear, and exact description of the same, reference being had tothe accompanying drawings forming part of this speciiication, in which-Figure 1 is a perspective view, the iloors and some of the timbers beingshown in section. Fig. 2 is a detached view of the weight employed fortightening the cable; and Fig. 3 is a front elevation, representing amodification of my apparatus.

Similar letters of reference in the accompanying drawings denote thesame parts.

The elevators heretofore used in hotels and other buildings have been soconstructed that, when the signal is sounded from any iioor, theattendant, it' in the car, cannot sce the indicator without stepping outupon the iioor.

My improvement consists in attaching the indicator to the wall of thecar, where the attendant can at all times see it without leaving hisplace, and in connecting said indicator to the knobs on the diii'ercntfloors by means of suitable conductors, substantially as hereinafterdescribed.

In the drawings, A is the wall of the build.

or turned on their axis, complete or break theA electrical or galvaniecircuit, and thereby signal to the attendant to raise or lower the earto the floor whence the signal is given. C, the car; E, the indicator;and m m m m, insulated strands connected to the indicating-plates c c,said strands being preferably wound into a cable at M. One end of thecable, being attached to the ear, is movable, while the other, attachedto the wall, is iixed. The slack ot' the cable may be allowed to hangloosely in the space between the car and the wall, or provision may bemade for taking it up, as shown in Figs. 1 and 2, where the cable isrepresented as passing over a pulley, T, attached to the wall, and thendown under another pulley, p, secured to a weight, w, saidlast-mentioned pulley and weight being sup ported by the bight of therope, as shown in the drawings.

Instead of this apparatus, the several knobs d1 d2 d3 d* might beconnected, by suitable con* ductors, to metallic strips n a a a, securedto the wall, as shown in Fig. 3, the several strands m m m m being eachconnected to a spring, s, supported upon the car, and sliding in contactwith the strips a, so as to make an electrical connection between eachplate of the indicator E and its appropriate knob dl d, Ste.

The indicating plate or face E is preferably constructed on the generalprinciple of my' electrical indicator patented February 28, 1871, No.112,242, although any other form of apparatus may be employed withoutdeparting from the principle of this invention..

Il prefer to place the cards or plates bearing the numbers of the floorsbehind the face of the box, and arrange openings in said face, so that,when the knob is pulled on any floor, the electric current thereby sentwill move the card numbered for that iioor infront of the opening, andthereby show the number of the iioor where the car is wanted.

The attendant hearing the sound of the alar1n-bell, which is operatedsimultaneouslyr with the movable card, has only to glance at the face ofthe box or case to see where his services are required. The apparatuscan be easily adjusted so that the movement of the card numbered 1 willcause the bell to strike once, while the movement of card No. 2 willcause it to strike twice, &c., thus indicating both to the eye and theear the exact place where the car is wanted.

Having thus described my invention, what I claim is- 1. The circuitmaking and breaking appa ratus d* d2, &c., and the connecting conductorM or n, in combination with an indicating 1pparatus, E, arranged uponthe car so as to be movable therewith, substantially as and for thepurpose as described.

2. The weight fw and pulley p, in combinaJ nation with the cable M of anelectrical indi cater for elevators, substantially as and for thepurposes herein set forth.

Vitnesses: AUG. HAHL.

NATI-IAN K. ELLswonTn, L. HILL.

